st/mesa: add st_BeginQuery() case for GL_ANY_SAMPLES_PASSED

Fixes piglit occlusion_query2 failure.

src/mesa/state_tracker/st_cb_queryobj.c

@@ -85,6 +85,8 @@ st_BeginQuery(struct gl_context *ctx, struct gl_query_object *q)
 
    /* convert GL query type to Gallium query type */
    switch (q->Target) {
+   case GL_ANY_SAMPLES_PASSED:
+      /* fall-through */
    case GL_SAMPLES_PASSED_ARB:
       type = PIPE_QUERY_OCCLUSION_COUNTER;
       break;